Nanotechnology Applied in the Design of the Next Generation of Canadian Concrete Pavement Surfaces
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An Investigation of High-Performance Self Compacting Concrete Under Flexural Loading
Civil Engineering and Architecture 8(6): 1414-1418, 2020 http://www.hrpub.org DOI: 10.13189/cea.2020.080624 An Investigation of High-Performance Self Compacting Concrete under Flexural Loading Theerthananda M P1,*, P C Srinivasa1, G M Naveen2 1Department of Civil Engineering, Government Engineering College, Kushalnagar, India 2Department of Civil Engineering, Government Engineering College, Chamarjanagar, India Received October 20, 2020; Revised November 25, 2020; Accepted December 30, 2020 Cite This Paper in the following Citation Styles (a): [1] Theerthananda M P, P C Srinivasa, G M Naveen, "An Investigation of High-Performance Self Compacting Concrete under Flexural Loading," Civil Engineering and Architecture, Vol. 8, No. 6, pp. 1414 - 1418, 2020. DOI: 10.13189/cea.2020.080624. (b): Theerthananda M P, P C Srinivasa, G M Naveen (2020). An Investigation of High-Performance Self Compacting Concrete under Flexural Loading. Civil Engineering and Architecture, 8(6), 1414 - 1418. DOI: 10.13189/cea.2020.080624. Copyright©2020 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract To shorten construction period, to assure compaction in the structure especially in confined zones where vibrating compaction is difficult and to eliminate noise due to vibration effective especially at concrete 1. Introduction products plants SCC is developed in practice. Also, SCC is applied to tunnel lining for preventing the cold joint High Performance Self Compacting Concrete (HPSCC) Self-compacting concrete has been used. Currently, the is the one which ability to Flow, good viscosity, main reasons for the employment of self-compacting segregation resistance and passing ability. -
Fiber in Continuously Reinforced Concrete Pavements 6
Technical Report Documentation Page 1. Report No. 2. Government 3. Recipient’s Catalog No. FHWA/TX-07/0-4392-2 Accession No. 4. Title and Subtitle 5. Report Date January 2006; Revised December 2006 Fiber in Continuously Reinforced Concrete Pavements 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. Dr. Kevin Folliard, David Sutfin, Ryan Turner, and David P. 0-4392-2 Whitney 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Center for Transportation Research 11. Contract or Grant No. The University of Texas at Austin 0-4392 3208 Red River, Suite 200 Austin, TX 78705-2650 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered Texas Department of Transportation Technical Report 9/1/01–8/31/03 Research and Technology Implementation Office 14. Sponsoring Agency Code P.O. Box 5080 Austin, TX 78763-5080 15. Supplementary Notes Project conducted in cooperation with the Federal Highway Administration and the Texas Department of Transportation. Project Title: Use of Fibers in Concrete Pavement 16. Abstract Continuously reinforced concrete pavement (CRCP) is a major form of highway pavement in Texas due to its increase in ride quality, minimal maintenance, and extended service life. However, CRCP may sometimes experience pavement distress that results in early failure, either due to under-design or the use of poor construction materials. Significant effort has been made to improve the performance of some of these materials (e.g. siliceous river gravel) to achieve an acceptable level of performance but has been unable to provide a practical solution. This research study investigates whether fiber reinforcement may solve some of the problems associated with siliceous river gravel, particularly spalling. -
Experimental Investigation on Nano Concrete with Nano Silica and M-Sand
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 03 | Mar 2019 www.irjet.net p-ISSN: 2395-0072 EXPERIMENTAL INVESTIGATION ON NANO CONCRETE WITH NANO SILICA AND M-SAND Mohan Raj.B1, Sugila Devi.G2 1PG Student, Nadar Saraswathi College of Engineering and Technology, Theni, Tamilnadu, India. 2Assistant Professor, Nadar Saraswathi College of Engineering and Technology, Theni, Tamilnadu, India. ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - The influence of Nano-Silica on various material is Nano Silica (NS). The advancement made by the properties of concrete is obtained by replacing the cement study of concrete at Nano scale has proved the Nano silica is with various percentages of Nano-Silica. Nano-Silica is used as much better than silica fume used in conventional concrete. a partial replacement for cement in the range of 3%, 3.5%, Now, the researchers are capitalizing on nanotechnology to and 10% for M20 mix. Specimens are casted using Nano-Silica innovate a new generation of concrete materials that concrete. Laboratory tests conducted to determine the overcome the above drawbacks and trying to achieve the compressive strength, split tensile and flexural strength of sustainable concrete structures. Evolution of materials is Nano-Silica concrete at the age of 7, 14 and 28 days. Results need of the day for improved or better performance for indicate that the concrete, by using Nano-Silica powder, was special engineering applications and modifying the bulk able to increase its compressive strength. However, the density state of materials in terms of composition or microstructure is reduce compared to standard mix of concrete. -
Sims-Lohman Fine Kitchens and Granite Meeting the Challenge of Transformation and Growth Head-On with Twelve Locations UR Narrative Begins in by Peter J
www.slipperyrockgazette.net VOLUME 20, ISSUE 236 THE BEACON OF THE STONE INDUSTRY FEBRUARY 2014 Sims-Lohman Fine Kitchens and Granite Meeting the Challenge of Transformation and Growth Head-On with Twelve Locations UR narrative begins in by Peter J. Marcucci the late 1990s, when the Steinman family acquired Photos Courtesy Sims-Lohman and by Larry Hood Moellering Industries, a quality cabinet supplier in Cincinnati, Ohio. Resolute and commit- ted, they did so knowing that the road to success is paved with a myriad of twists, turns and crossroads and is sometimes strewn with the remnants of previous entrepreneurs. Choosing to fast track the journey, Steve Steinman, along with John Beiersdorfer, President of Sims-Lohman, and a cohesive working group of talent, switched on their internal GPS’s, buckled their seat belts, and accelerated the ride by adding acquisition after acquisition to their portfolio of premium companies in the greater Cincinnati, Ohio region to create Sims-Lohman Fine Kitchens and Granite. Spanning four states and employing over 300 people, Sims-Lohman has since dotted that roadmap with eight locations within Ohio, two A trough sink and built-in wine rack are high- in Indiana, one in Kentucky, and their latest lights of this 3cm Magma granite island and acquisition in Pittsburgh, Pennsylvania. All breakfast area. The contemporary cabinets twelve locations are sales showrooms, with company, we adopted that name. Following effective. A lot of companies in the countertop unmistakably define Sims-Lohman as the area’s four being fabrication facilities, strategically this acquisition, we acquired two granite fab- world either made that switch, or they didn’t gold standard and a shop of distinction. -
To the One Who Loved Me, Died for Me and Has Been Raised
To the One Who loved me, died for me and has been raised. (Bible 2 Corinthians 5:14-15) Acknowledgements In this age, with the next millennium fast approaching, no one can carry out research work alone. Therefore, the author would like to show his appreciation to the many people who assisted with this study. First, I would like to give thanks to my supervisor Dr. P. L. Domone, who helped with this work, gave valuable suggestions and also corrected my written English patiently. I also appreciated Dr. Y. Xu's kind suggestions and encouragement, and both Dr. K. Ozawa and Dr. J.C. Liu supplied useful information concerning this study. I also enjoyed discussing this research work with my junior colleagues: Mr. V. Sheikh, Mr. E.M. Ahmed and Mrs. J. Jin. Furthermore, Mr A. Tucker and Miss H. Kinloch carried out several mixes concerning the early strength of SCC as their final year project under my guidance. The help I received from the technical staff of the Elvery Concrete Technology Laboratory cannot be ignored, especially from Mr. 0. Bourne and Mr. M. Saytch. Furthermore, I would like to acknowledge the scholarship from my government, without which the dream of studying in this country could not have come true, after having spent 12 years teaching. I especially want to give thanks to my family - my mother, my wife Priscilla and May and Boaz for their support. I owe them very much. I also appreciated the care from the saints in the church - it is impossible to list all of them. -
Proposing a New Method Based on Image Analysis to Estimate the Segregation Index of Lightweight Aggregate Concretes
materials Article Proposing a New Method Based on Image Analysis to Estimate the Segregation Index of Lightweight Aggregate Concretes Afonso Miguel Solak 1,2 , Antonio José Tenza-Abril 1 , Francisco Baeza-Brotons 1 and David Benavente 3,* 1 Department of Civil Engineering, University of Alicante, 03080 Alicante, Spain; [email protected] (A.M.S.); [email protected] (A.J.T.-A.); [email protected] (F.B.-B.) 2 CYPE Ingenieros S.A., 03003 Alicante, Spain 3 Department of Earth and Environmental Sciences, University of Alicante, 03080 Alicante, Spain * Correspondence: [email protected] Received: 18 October 2019; Accepted: 1 November 2019; Published: 5 November 2019 Abstract: This work presents five different methods for quantifying the segregation phenomenon in lightweight aggregate concretes (LWAC). The use of LWACs allows greater design flexibility and substantial cost savings, and has a positive impact on the energy consumption of a building. However, these materials are susceptible to aggregate segregation, which causes an irregular distribution of the lightweight aggregates in the mixture and may affect the concrete properties. To quantify this critical process, a new method based on image analysis is proposed and its results are compared to the well-established methods of density and ultrasonic pulse velocity measurement. The results show that the ultrasonic test method presents a lower accuracy than the other studied methods, although it is a nondestructive test, easy to perform, and does not need material characterization. The new methodology via image analysis has a strong correlation with the other methods, it considers information from the complete section of the samples, and it does not need the horizontal cut of the specimens or material characterization. -
(AUTONOMOUS) Dundigal, Hyderabad- 500 043 CONCRETE TECHNOLOGY (ACE010) IARE-R16 B.Tech V SEM
INSTITUTE OF AERONAUTICAL ENGINERRING (AUTONOMOUS) Dundigal, Hyderabad- 500 043 CONCRETE TECHNOLOGY (ACE010) IARE-R16 B.Tech V SEM Prepared by Mr. N. Venkat Rao, Associate Professor Ms.B.Bhavani, Assistant Professor COURSE GOAL • To introduce properties of concrete and it constituent materials and the role of various admixtures in modifying these properties to suit specific requirements, such as ready mix concrete, reinforcement detailing, disaster-resistant construction, and concrete machinery have been treated exhaustively the and also special concrete in addition to the durability maintenance and quality control of concrete structure. COURSE OUTLINE UNIT TITILE CONTENT I CEMENT Portland cement, chemical composition, Hydration, ADMIXTURE Setting of cement, Structure of hydrate cement, Test & on physical properties, Different grades of cement. AGGREGATE Mineral and chemical admixtures, properties, dosage, effects, usage. Classification of aggregate, Particle shape & texture, Bond, strength & other mechanical properties of aggregate, Specific gravity, Bulk density, porosity, adsorption & moisture content of aggregate, Bulking of sand, Deleterious substance in aggregate, Soundness of aggregate, Alkali aggregate reaction, Thermal properties, Sieve analysis, Fineness modulus, Grading curves, Grading of fine & coarse Aggregates, Gap graded aggregate, Maximum aggregate size. COURSE OUTLINE UNIT TITILE CONTENT II FRESH Workability, Factors affecting workability, CONCRETE Measurement of workability by different tests, Setting times of concrete, Effect of time and temperature on workability, Segregation & bleeding, Mixing and vibration of concrete, Steps in manufacture of concrete, Quality of mixing water. COURSE OUTLINE UNIT TITILE CONTENT III HARDENED Water / Cement ratio, Abram’s Law, Gel space ratio, CONCRETE Nature of strength of concrete, Maturity concept, TESTING Strength in tension & compression, Factors affecting OF strength, Relation between compression & tensile HARDENED strength, Curing. -
Vysoké Učení Technické V Brně Brno University of Technology
VYSOKÉ UČENÍ TECHNICKÉ V BRNĚ BRNO UNIVERSITY OF TECHNOLOGY FAKULTA STAVEBNÍ FACULTY OF CIVIL ENGINEERING ÚSTAV TECHNOLOGIE STAVEBNÍCH HMOT A DÍLCŮ INSTITUTE OF TECHNOLOGY OF BUILDING MATERIALS AND COMPONENTS VLIV VLASTNOSTÍ VSTUPNÍCH MATERIÁLŮ NA KVALITU ARCHITEKTONICKÝCH BETONŮ INFLUENCE OF INPUT MATERIALS FOR QUALITY ARCHITECTURAL CONCRETE DIPLOMOVÁ PRÁCE DIPLOMA THESIS AUTOR PRÁCE Bc. Veronika Ondryášová AUTHOR VEDOUCÍ PRÁCE prof. Ing. RUDOLF HELA, CSc. SUPERVISOR BRNO 2018 1 2 3 Abstrakt Diplomová práce se zaměřuje na problematiku vlivu vlastností vstupních surovin pro výrobu kvalitních povrchů architektonických betonů. V úvodní části je popsána definice architektonického betonu a také výhody a nevýhody jeho realizace. V dalších kapitolách jsou uvedeny charakteristiky, dávkování či chemické složení vstupních materiálů. Kromě návrhu receptury je důležitým parametrem pro vytvoření kvalitního povrchu betonu zhutňování, precizní uložení do bednění a následné ošetřování povrchu. Popsány jsou také jednotlivé druhy architektonických betonů, jejich způsob vyrábění s uvedenými příklady na konkrétních realizovaných stavbách. V praktické části byly navrženy 4 receptury, kde se měnil druh nebo dávkování vstupních surovin. Při tvorbě receptur byl důraz kladen především na minimální segregaci čerstvého betonu a omezení vzniku pórů na povrchu ztvrdlého betonu. Klíčová slova Architektonický beton, vstupní suroviny, bednění, separační prostředky, cement, přísady, pigment. Abstract This diploma thesis focuses on the influence of properties of feedstocks for the production of quality surfaces of architectural concrete. The introductory part describes the definition of architectural concrete with the advantages and disadvantages of its implementation. In the following chapters, the characteristics, the dosage or the chemical composition of the input materials are given. Besides the design of the mixture, important parameters for the creation of a quality surface of concrete are compaction, precise placement in formwork and subsequent treatment of the surface. -
Calculating the Compressive Strength of Concrete Structures Using Effects of Freeze-Thaw Cycles on Electrical Resistivity
Research Article iMedPub Journals Global Environment, Health & Safety 2018 www.imedpub.com Vol.2 No.1: 6 Calculating the Compressive Strength of Concrete Structures Using Effects of Freeze-Thaw Cycles on Electrical Resistivity Soroosh Sobhkhiz1*, Mohammad Hossein Eftekhar2 and Mohammad Shekarchi Zadeh2 1School of Civil Engineering, College of Engineering, University of Tehran, Iran 2Institute of Construction Materials, University of Tehran, Tehran, Iran *Corresponding author: Soroosh Sobhkhiz, School of Civil Engineering, College of Engineering, University of Tehran, Iran, Tel: +989128996097; E-mail: [email protected] Received date: April 06, 2018; Accepted date: May 20, 2018; Published date: May 30, 2018 Copyright: © 2018 Sobhkhiz S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation: Sobhkhiz S, Eftekhar MH, Zadeh MS (2018) Calculating the Compressive Strength of Concrete Structures Using Effects of Freeze-Thaw Cycles on Electrical Resistivity. Glob Environ Health Saf. Vol. 2 No. 1: 6. human beings, while they are constantly exposed to harms caused by the environment. Sustainable development involves Abstract meeting present needs without compromising the ability of future generations to meet their needs [2]. The ecological Traditionally, one of the influential parameters in criteria for sustainable development are the preservation of concrete structures sustainability has been the number of biodiversity and adoption of human activities to the natural freeze-thaw cycles over the life period of concrete resources and tolerance of nature [3]. structures. Since some regions in the world have highly variable climates, freeze-thaw cycles are one of the most Fatigue-induced damages are one of the main contributor important factors that decreases the lifetime service of factors in structural components failure [4-6]. -
Armorhab: Design Reference Architecture (DRA) for Human
Copyright © 2016 by Dark Sea Industries LLC and the University of New Mexico. Published by The Mars Society with permission ArmorHab: Design Reference Architecture (DRA) for human habitation in deep space Peter Vorobieff Professor and Assistant Chair, Assistant Chair of Facilities, Department of Mechanical Engineering University of New Mexico, Albuquerque, NM, 87131 Phone: (505) 277-8347 email: [email protected] Affiliation: University of New Mexico Craig Davidson Administrator 4808 Downey NE Albuquerque, NM 87109 Phone: 505-720-2321 email: [email protected] Affiliation: Dark Sea Industries LLC Dr. Mahmoud Reda Taha, Peng Professor and Chair, Department of Civil Engineering University of New Mexico, Albuquerque, NM 87131-0001 Office: (505) 277-1258, Cell: (505) 385-8930, Fax (505) 277-1988 http://civil.unm.edu/faculty-staff/faculty-profiles/mahmoud-taha.html www.unm.edu/~mrtaha/index.htm Affiliation: University of New Mexico Christos Christodoulou Associate Dean for Research Distinguished Professor, Electrical & Computer Engineering University of New Mexico Albuquerque, NM 87131 Tel: (505) 277-6580 www.ece.unm.edu/faculty/cgc www.cosmiac.org Affiliation: University of New Mexico Anil K. Prinja Professor and Chair Department of Nuclear Engineering University of New Mexico Albuquerque, NM 87131-1070 -1- Copyright © 2016 by Dark Sea Industries LLC and the University of New Mexico. Published by The Mars Society with permission Phone: (505)-277-4600, Fax: (505)-277-5433 [email protected] Affiliation: University of New Mexico Svetlana V. Poroseva Assistant Professor Department of Mechanical Engineering University of New Mexico, Albuquerque, NM, 87131 Phone: 1(505) 277-1493, Fax: 1(505) 277-1571 email: poroseva at unm.edu Affiliation: University of New Mexico Mehran Tehrani Assistant Professor Department of Mechanical Engineering University of New Mexico, Albuquerque, NM, 87131 Phone: 1(505) 277-1493, Fax: 1(505) 277-1571 email: [email protected] Affiliation: University of New Mexico David T. -
Cup-Wheel Product Range for CMG 1700 Concrete Grinder
Cup-wheel product range for CMG 1700 concrete grinder Top professional quality for an optimum abrasion rate and a long durability; dif- ferent segment qualities for different material hardnesses; smooth running and durable. Select the suitable grinding cup-wheel for the surface to be machined BST 125 — CYCLONE Premium cup-wheel with 12 segments, long durability for a universal range of applications; optimal dust removal due to offset segment arrangement, consistent diamond coating for constant grinding performance, highly abrasive; coarser grinding pattern;ideal for grinding down hard concrete, ground preparation on hard screed, removing tile adhesive and formwork seams, lime sandstone, sanding lime-cement plaster, and for levelling natural stone Hard concrete Flexible adhesive Screed Type Art. no. Ø Height Bore No. seg- Height mm mm mm ments Segm. mm BST 125 19289 125 22 22.23 12 7 GST 125 – GRINDER Precision diamond cup-wheel with hard segments, premium quality for a perfect grinding pattern on abrasive materials; suitable for sanding and levelling fresh concrete and removing layers of sludge, tile adhesive, fresh screed, cement plas- ter, gypsum plaster, and also for fine sanding of marble and soft natural stone Fresh concrete Tile adhesive Soft natural stone Type Art. no. Ø Height Bore No. seg- Height mm mm mm ments Segm. mm GST 125 19293 125 22 22.23 8 7 Cup-wheel product range UST 125 – UNIVERSAL Standard diamond grinding cup for abrasive material with a very good abrasion to enable rapid working progress; out- standing price/performance ratio; ideal for a wide range of applications such as levelling fresh concrete, screed, mineral adhesives, cement plaster, cement-based fillers and abrasive natural stone (e.g. -
STATE of HAWAII DEPARTMENT of TRANSPORTATION HIGHW a YS DIVISION HONOLULU, HA Wail
STATE OF HAWAII , DEPARTMENT OF TRANSPORTATION HIGHW AYS DIVISION . , .' HONOLULU, HA WAIl SPECIAL PROVISIONSJ PROPOSALJ CONTRACTJ BOND AND PLANS FOR ALA MOANA BOULEVARD J SEALING OF WELL ., AT ALA MOANA MINI-PARK PROJECT NO. 92A-03-81 DISTRICT OF HONOLULU ISLAND OF OAHU 1981 Ct:J r~- .- .-. -- , -- <: - r-- , c. i ~ j ""1-" co C ,~ p:-: . ""'I-- I ):.--' -- C -..; " ''''\, -:, fTII < 2:::0 fTl ~PO c......:: 0 -t « P •. STATE OF HAWAII DEPARTMENT OF TRANSPORTATION HIGHWAYS DIVISION HONOLULU, HAWAII SPECIAL PROVISIONS, PROPOSAL, CONTRACT, BOND AND PLANS FOR ALA MOANA BOULEVARD, SEALING OF WELL AT ALA MOANA MINI-PARK PROJECT NO. 92A-03-8l DISTRICT OF HONOLULU ISLAND OF OAHU 1981 Improvements consist of sealing existing Well No. 1851-22 with sand cement or neat cement grout, and is located at Ala Moana Mini-Park, near the intersection of Ala Moana Boulevard and Richards Street. The existing well is 8 inches in diameter with a total depth of about 1152 feet and cased to a depth of 986 feet. 92A-03-81 4/16/81 ) I 1.ff IJ II c \ I I \ -I I \ I I ,! ! ! &: IIII~~~'-",'_,I_J!1,_1111 _______ TABLE OF CONTENTS Page No. Notice to Bidders Instructions to Bidders 1 - 4 Special Provisions DIVISION 100 - GENERAL PROVISIONS Sectl.on Title Page No. 101 Definitions and Terms 101-1 102 Bidding Requirements and Conditions 102-1 103 Award and Execution of Contract Award of Contract . 0 0 • • • • 0 103.03-1 Requirement of Contract Bond 103.06-1 104 Scope of Work . 104-1 105 Control of Work Authority of the Engineer • • 105.01-1 Construction Stakes, Lines and Grades 0 • 0 0 0 0 • • 105.07-1a Load Restrictions 105.13-1 Acceptance • .